Three cubes of edge 8 cm each are joined end to end to form a cuboid. Find the
surface area and volume of the cuboid so formed.
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A room is 6m long, 5m wide and 4m high. The doors and windows in the room
occupy 4 square metres of space. Find the cost of papering the remaining portion of
the walls with paper 75cm wide at the rate of ` 2.40 per metre.
occupy 4 square metres of space. Find the cost of papering the remaining portion of
the walls with paper 75cm wide at the rate of ` 2.40 per metre.
Answered by
9
Side of cubes = 8 cm
Now,
length of the cuboid formed if three cubes are joined together = 3×8= 24 cm
height of cuboid formed = 8 cm
breadth of cuboid = 8 cm
surface area of cuboid = 2( lb+ bh+lh)
solution:
Surface area:
=2(24×8+8×8+8× 24)
=2(192+64+192)
=2×448
= 896cm²
volume= l×b×h
= 24×8×8
= 1536cm³
HOPE IT HELPS YOU...
Now,
length of the cuboid formed if three cubes are joined together = 3×8= 24 cm
height of cuboid formed = 8 cm
breadth of cuboid = 8 cm
surface area of cuboid = 2( lb+ bh+lh)
solution:
Surface area:
=2(24×8+8×8+8× 24)
=2(192+64+192)
=2×448
= 896cm²
volume= l×b×h
= 24×8×8
= 1536cm³
HOPE IT HELPS YOU...
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